Air conditioning system



. W. JQHNSON Juiy G W AIR CONDITIONING SYSTEM Filed Feb. 26. 1952 2sheets sheec l WASH 8 EXTRACT/N6 EXTRA TOR 6,

, WASH R WASHER I I DRYING RooM am FIN/SH/NG ROOM IRONER INVENTOR GEORGEW, JOHNSON ATTORN EYS ,2 Sheets-Sheet. 2

G. W. JOHNSON AIR CONDITIONING SYSTEM Filed Feb. 26

Patented July 24, 1934 UNITED STATES 1,967,940 AIR CONDITIONINGISYSTEMGeorge W. Johnson,

The American Laundry Machinery Cincinnati, Ohio, assignor to Company,

Norwood, Ohio, a corporation of Ohio Application February 26, 1932,Serial No. 595,296 3 Claims. (01. 98-33) This invention relates toventilating and air conditioning means for laundries. The nature of thework in every laundry is such as to produce a very high humidity in thelaundry building, so

6 that every laundry either has or should have a ventilating systemincluding air conditioning means for correcting this humidity conditionto which the operators are otherwise subjected. Usual laundry equipmentincludes one or more drying machines each including a motor-drivenblower arranged to pass air through the drier, the drier having inletandoutlet openings for the air.

The object of the present invention is to provide an association betweenthe ventilating system and such a drier or driers whereby the blowers ofthe latter may serve to produce air circulation in the former during thedrying operation, so that operating expenses will be proportionallyreduced.

The exact nature of this invention together with further objects andadvantages thereof will be apparent from the following description takenin connection with the accompanying drawings, in which Fig. 1 is aconventionalized showing of a typical laundry with its pertinentequipment; and Fig. 2 is a wiring diagram of the pertinent electricalequipment.

With reference now to the drawings, the laundry illustrated includesthree rooms: finishing room, drying room, and washing and extractingroom, respectively, arranged in ascending order. Ironers and presses arelocated in the finishing room, driers in the drying room, and washersand extractors in the washing and extracting room, all as indicated.

The laundry is provided with a ventilating system in two parts, one forejecting air from the laundry rooms, and the other for inducing airthereinto.

The ejector part comprises a motor-driven fan or blower 1 connected bypiping 2 to grills 3 located adjacent the upper extremities of therooms, and having an outlet pipe 4 opening outside of the building. Thusoperation of the blower 1 removes air from the interior of the laundryand delivers such air outside the laundry.

The induction part of the ventilator system comprises an air conditioner5, piping 6 leading thereto from the outside of the building and piping7 leading from the air conditioner to'grills 8 in the various rooms atlow levels therein. The details of the air conditioner are immaterialhere, where it will sufice to state that the principal functions of theconditioner are to wash the air which passes therethrough and removemoisture therefrom. A blower 9 driven by a motor 10 is arranged in thepiping 6 whereby outside air is delivered to the an conditioner andthence to the rooms by way of the piping '7 and grills 8.

It will be apparent that when the blowers 1 and 9 are operating, fresh,conditioned air will be forced into the rooms, and overheated overlymoist air removed therefrom.

There are usually a plurality of driers 11, 11a, and they are preferablylocated as indicated on the same floor with the air conditioner 5. Eachdrier is provided with a blower, driven by a motor 12, 12a, that dryingair may be circulated therethrough.

According to my invention I arrange piping 13 that the driers may takeair from the pipes 6 ahead of the ventilating blower 9, and piping 14that the driers may deliver air to the air conditioner 5. Aircirculation is therefore parallel, through the driers and the blower 9.Thus, if any of the driers including its blower be in operation, it isunnecessary that the fan 9 be also in operation.

My invention, therefore, provides that operation of the motor 10 of theventilating blower 9 shall automatically cease to function when any ofthe drier motors 12 are functioning. Fig. 2 of the drawings shows amanner of such accomplishment. In this figure control parts to begenerall described and associated with the second drier fan motor 12a,bear reference characters corresponding to those applied to thecorresponding parts hereinafter specifically described as associatedwith the first drier fan motor 12, but bearing the sumx a to indicatethat they are parts of the second of the possible plurality of drierfans which may be employed, as has been described.

Current is supplied through the line wires L1, L2, and L3. One of theline wires L1 has a constant connection with the veltilating motor 10and each of the motors 12, 12a of the driers 11, 11a. Each drier motor12 is provided with the usual start and stop switches 24 controllingenergization of the coil 15 ot a double pole relay switch having itscontactors 16 in circuit with the L2, L3, motor leads; each relay switchincluding also a maintaining contactor 17 whereby the coil 15 will bemaintained energized or deenergized, and the motor 12 consequently inoperation or out of operation, dependent upon which of the switches 24has last been depressed.

Each dried motor controlling relay switch is provided with a fourcontactor 18 in circuit with a line 19 running between L1 and L3 andinclud-, ing the relay coil 20 and preferably an emergency switch 21.The broken line 22 indicates the connection with L3 in the case of onlyone drier. Where two or more driers are employed this connection wouldbe beyond the motor 12 most removed to the right Fig. 2.

The coil 20 is one of a relay switch having a pair of contactors 23 inthe L2, L3 connections for the motor 10 of the ventilating blower 9, thearrangement being such that when the coil 20 is energized the motor 10will have complete operating connections.

The entire arrangement will be recognized as one whereby the switchcontrolling the motor 10 is opened to 'stop operation of that motor,whenever but only when one or more of the drier motors 12 are inoperation, the coil 20 of the ventilating motor relay switch beingsimply in a circuit including the switches 18 of the drier motors inseries relation.

In Fig. 2 neither of the two drier motors are operating, their switchesbeing open, the switches 18 being closed to energize the coil 20, sothat the contactors 23 are closed and the ventilating motor 10 isindicated as operatingthis assuming the three pole line switch closed.Instantly one of the start buttons 24 is depressed the coil 15 will beenergized to start the corresponding drier motor 12, opening thecorresponding contact at 18, thus de-energizing the coil 20 and stoppingthe ventilating motor 10.

It will be'obvious that by the described arrangement whenever power isbeing supplied to any of the driers, no power is expended in operatingthe blower 9, the drier blowers serving in the ventilating system andthus functioning in dual capacity.

While an automatic association has been illustrated and described,between the motor of the fan 9 of the ventilating system, and the motors12, 12a of the drier blowers, it will be apparent that even withoutautomatic operation there are advantages derived from my arrangement.Thus, where the motors are manually operated one or more or the drierblowers may be used to speed up the ventilating system as on extremelyhot days, whether or not their driers are in operation.

What I claim is:

1. .In a laundry, in combination with a ventilating system having anair-circulating blower, a drier having an operator-controlledair-circulating blower, conduit means connecting said blowers inparallel relation, driving motors for said blowers, and meansinterassociating said motors to make the operation of the blower of saidventilating system dependent upon nonoperation of that of said drier,whereby said drier may have intermittent operation, and when operatingits blower will function in said ventilating system, but functioning ofsaid ventilating system will be maintained independent of operation ofsaid drier. V

2. In a laundry, in combination with a ventilating system having anair-circulating blower, a plurality of driers having air-circulatingblowers, conduit means connecting said blowers in parallel relation,individual driving motors for said blowers, and means interassociatingsaid motors to make the operation of the blower of said ventilatingsystem dependent upon coincident non-operation of those of said driers.

3. In a laundry, in combination with a ventilating system having anair-circulating blower, a drier having an air-circulating blower,conduit means connecting said blowers in. parallel relation, andindividual driving motors for said blowers, whereby the blower of saiddrier may be caused to serve in said ventilating system, saidventilating system including air conditioning means arranged in thesystem after said blowers to be efiective upon air discharged from both.

GEORGE W. JOHNSON.

